Temperature dependence of local vibrational mode optical absorption for carbon acceptors in GaAs

1989 ◽  
Vol 54 (11) ◽  
pp. 1013-1015 ◽  
Author(s):  
L. Sargent ◽  
J. S. Blakemore
Keyword(s):  
Optical Absorption ◽  
Temperature Dependence ◽  
Vibrational Mode ◽  
Local Vibrational Mode

Trivacancy-oxygen complex in silicon: Local vibrational mode characterization

2009 ◽  
Vol 404 (23-24) ◽  
pp. 4568-4571
Author(s):  
L.I. Murin ◽  
B.G. Svensson ◽  
J.L. Lindström ◽  
V.P. Markevich ◽  
C.A. Londos
Keyword(s):  
Vibrational Mode ◽  
Local Vibrational Mode ◽  
Oxygen Complex

Quantitative assessment of Be acceptors in GaAs by local vibrational mode spectroscopy

1991 ◽  
Vol 69 (2) ◽  
pp. 971-974 ◽  
Author(s):  
J. Wagner ◽  
M. Maier ◽  
R. Murray ◽  
R. C. Newman ◽  
R. B. Beall ◽  
...  
Keyword(s):  
Quantitative Assessment ◽  
Vibrational Mode ◽  
Local Vibrational Mode ◽  
Mode Spectroscopy

Article

1998 ◽  
Vol 76 (4) ◽  
pp. 411-413
Author(s):  
Yixing Zhao ◽  
Gordon R Freeman
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Temperature Dependence ◽  
Optical Absorption Spectrum ◽  
Infrared Light ◽  
Solvated Electron ◽  
Solvated Electrons ◽  
Tert Butanol ◽  
Solvent Dependence ◽  
Increasing Temperature

The energy and asymmetry of the optical absorption spectrum of solvated electrons, es- , change in a nonlinear fashion on changing the solvent through the series HOH, CH3OH, CH3CH3OH, (CH3)2CHOH, (CH3)3COH. The ultimate, quantum-statistical mechanical, interpretation of solvated electron spectra is needed to describe the solvent dependence. The previously reported optical spectrum of es- in tert-butanol was somewhat inaccurate, due to a small amount of water in the alcohol and to limitations of the infrared light detector. The present note records the remeasured spectrum and its temperature dependence. The value of the energy at the absorption maximum (EAmax) is 155 zJ (0.97 eV) at 299 K and 112 zJ (0.70 eV) at 338 K; the corresponding values of G epsilon max (10-22 m2 aJ-1) are 1.06 and 0.74. These unusually large changes are attributed to the abnormally rapid decrease of dielectric permittivity of tert-butanol with increasing temperature. The band asymmetry at 299 K is Wb/Wr = 1.8.Key words: optical absorption spectrum, solvated electron, solvent effects, tert-butanol, temperature dependence.

scholarly journals Ronald Charles Newman FInstP. 10 December 1931 — 30 July 2014

2015 ◽  
Vol 62 ◽  
pp. 447-459
Author(s):  
Bruce A. Joyce
Keyword(s):  
Gallium Arsenide ◽  
Integrated Circuits ◽  
Epitaxial Growth ◽  
Vibrational Mode ◽  
Fundamental Importance ◽  
Local Vibrational Mode ◽  
Mode Spectroscopy ◽  
And Diffusion

Ronald Charles (Ron) Newman was one of the most versatile semiconductor physicists of his generation and is distinguished for his work in several different areas, most notably epitaxial growth and the behaviour of impurities and dopants in a range of device-related materials, mainly silicon and gallium arsenide. His most significant contributions came from the application of local vibrational-mode spectroscopy to studies of the segregation and diffusion of oxygen and hydrogen in silicon. The results were of fundamental importance in the fabrication of integrated circuits.

Sign in / Sign up

Export Citation Format

Share Document